gekhardt



(N0 Model.) v 2 Sheets-Sheet 1.

J. GERHARDT.

. STEAM GOVERNOR. r No. 349,492. Patented Sept. 21, 1886.

' INVENTOB ATTORNEYS.

N. PETERS. Photo-Lnrwgnpher. wahin mn, D C- (No Model.) 2 SheetsSheet 2. J. GBRHARDTJ STEAM GOVERNOR. No. 349,492. Patented Sept. 21, 1886.

WITNESSES: I INVENTOR:

gzmzaw 1M BY Mum ATTORNEYS.

N, PEI'EIIS. Phoh-Lilhognphlr. Washington, D.C-

' UNITED STATES PATENT OFFICE.

JOHN GERHARDT, OF MONTREAL, QUEBEC, CANADA.

STEAM-G OVERNOR.

SPECIFICATION forming part of Letters Patent No. 349,492, dated September 21, 1886.

Application filed Julie 15, 1886.

To all whom it may concern:

Be it known that I, JOHN GERHARDT, of Montreal, in the Province of Quebec and Dominion of Canada, have invented a new and Improved Steam-Governor, of which thei'ol-' lowing is a full, clear, and exact description.

My invention consist-s, principally,'of a governor for steamengines wherein the governorvalve is operated by pivoted vanes and suitable mechanism connected therewith, the vanes being arranged'to be acted upon by centrifugal force and the resistance of the air for opening the vanes against the tension of a mainspring arranged to normally hold the vanes closed or drawn inward toward the axis of the governor.

The invention also consists of the connections of the vanes or the shafts thereof to the inainspring or its inclosing-barrel, whereby the length of leverage gradually decreases as the opening angle between the radii of the governor and the vanes increases, and vice versa.

The invention also consists of means for regulating the tension of the mainspring, of the means employed for lifting the valve-rod, and of the construction, arrangement, and combination of parts, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a central vertical sectional elevation of my new and improved governor. Fig. 2 is a detailed view showing the means for regulating the tension of the mainspring. Fig. 3 is a sectional plan view on line a: m of Fig. 1, and Fig. 4 is a similar view on line 3 3 of Fig. 1.

A represents the main hollow standard of the governor formed with the base A and oilcup A and formed or provided with the horizontal arm A which constitutes the bearing for the motor-shaft 13. Within the hollow standard Ais placed the tube 0, which is arranged to be revolved by the shaft 13, through the medium of the two beveled gear-wheels B and G, secured, respectively, upon the shaft B and tube 0, so as to mesh with each other, the tube 0 being stepped upon the standard A by the collar or annular boss 0 formed or se- Serial No. 205,920. (No infidel.)

cured upon the tube, as shown clearly in Fig. 1. Secured to the tube 0, above the collar or boss 0", are the two circular plates D D, and within the tube 0 is placed loosely the valverod E, which is constantly pressed downward by the spiral spring F, which acts between the upper end' of the rod E and the plug G, screwed into the upper end of the said tube 0. To the lower end of the rod E is attached, by a setscrcw or otherwise, the small rod E, which passes down through the stuffingbox II in the base-plate A to the steam-valve. (Not shown.) The valve-rod E in the tube 0 is saddled upon the cross-bar I, the said rod and tube being respectively and correspondingly mortised, as shown at a b, for the passage through them of the said cross-bar I, and the rodE is provided at its upper end with the screwc, which inipinges upon the upper edge of the cross-bar I, so that by turning this screw the rod E may be raised or lowered for adjusting it relatively to the governor-valve, to which it maybe connected by rod E, and which it is designed to operate.

either side of the tube 0, are secured the two vertical posts J J, and in line with the said posts are journaled, in the plates D D, the two vertical shafts'K K, each of which is provided with a vane, L, and these vanes project in opposite directions from their respective shafts, as shown clearly in Figs. 3 and 4. The shafts K are each providedwith a horizontal cam, M, and the said shafts are yoked together by a rod, N, connected to the cams, as shown in Fig. 4, so that the said shafts and the vanes L will move exactly in unison. The cams M are (in the operation of the governor) for raising and lowering the crossbar I, and with it the valve-rod E E, as the vanes L veer to and from the axis or center of the plates D D. The cams M act upon the ends of the bar I, and to avoid friction the small rollers i 'i are journaled upon the ends of the bar I, under and against which the cams act, and beneath the cams are placed the rollers z" i, also attached to the posts J, so the cams act between the rollers 71 i and with very little friction. For guiding the barIin its up-anddown movement, the vertical posts J are slotted at j for the passage through said posts of the bar I, as clearly shown in Figs. 1 and 4.

Between the two circular plates D D, on

The vanes L are normally held c1osedthat is held at the position shown in full lines in Fig. 4t-by the m ainspring P, which acts through the medium of thebarrel Q, which incloses the spring, and the connections or chains R R, connected with the said barrel, and the heads 7c 7r, secured to the upper ends of the vaneshafts K.

The barrel Q is placed loosely upon the collar S, which is slipped upon the upper end of the tube 0 and rests upon the upper surface of the upper circular plate, D. The outer end of the spring is attached to the barrel Q,wl1ileits inner end is attached to the said collar, so that any tension upon thespring (the collar S being relatively stationary) will tend to turn the barrel upon the collar. The collar S is locked in its relativelystationary position by the wormwheel (Z, seen red thereon, and the small wormshaft (1, which meshes with the worm-wheel, and is journaled in two lugs, 6, formed upon the frame T, which rises from the upper sur face of the plate D, as shown in' Fig. 2. The

worm-shaft d is made square at one end for the application of a key for turning the collar Q for winding the mainspring P, to increase or diminish the tension thereof, so its reaction upon the vanes L may be adjusted to increase or diminish the speed of the engine.

The heads k, at the upper ends of the vaneshafts K, and to which the chains R are connected, are by preference eccentrics. These act as levers, and are arranged so that their greatest leverage is applied to the vanes L at the time the vanes are closed, as shown in Fig. 3, and are least affected by the resistance of the atmosphere in revolving. The object of this is to increase the sensitiveness of the governor when running at its normal speed. As

the speed increases and the vanes open outward under the influence of the centrifugal force and the resistance of the air, the leverage of the mainspring P upon the vanes gradually diminishes in length, so that at high speed the vanes are very sensitive and vary with every slight variation of the speed of the g0vernor.

m m are stoprods fitted in the plates D D to prevent the vanesL from being drawn inward too far by the action of the mainspring P, and upon the lower ends of the shafts K are secured the stop-fingers m, that are adapted to strike the stop-screws m" to limit the out ward movement of the vanes L.

Having thus fully described my invention,

I claim as new and desire to secureby Letters Patent 1. In a steam-governor, the combination, with the valve-rod, of rotating and pivoted vanes controlled by a spring acting independently of the valve-rod and connected to the valve-rod by means whereby the opening and closing of the vanes will move the valve-rod longitudinally, substantially as described.

2. The valve-rod E, resting upon the crosspiece Lin combination with the shafts K,vanes L, and cams M, for lifting the cross-piece I and valve-rod, substantially as described.

3. The shafts K, to which the vanes are secured, in combination with the mainspring P, the eccentrics k, and the connecting-chains R, substantially as and for the'purposes described.

4. The barrel Q, containing the mainspring P, in combination with the vanes and vaneshafts and connections R, the barrel beingprovided with means for turning the same forincreasing or diminishing the tension of the spring, substantially as described.

5. The standard A, containing the revolving sleeve 0, and the revolving valve-rod E, and provided with the plates DD, in combination with the vanes L and their shafts K, the cams M, cross-bar I, that rests upon the cams and supports the valve-rods E, the mainspring P, barrel Q, and the chains R, connecting the bar-' rel with the sh aft-s K,substan ti ally as described.

JOHN GERHARDT.

Vitnesses:

B. V. GRODFlNSKI, H. A. \VEs'r. 

